GO:0140823 histone H2BS36 kinase activity: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0140823 histone H2BS36 kinase activity is a molecular_function term describing the ATP-dependent phosphorylation of serine 36 of histone H2B, producing histone H2B-phosphoserine 36 and ADP.
• The reaction is a chromatin-level signaling event that couples cellular kinase pathways to histone modification and gene expression control.
• AMPK/Snf1 signaling is a conserved regulator of histone acetylation and epigenetic functions, providing a mechanistic framework for understanding how metabolic kinases influence chromatin marks.
• S6K1 signaling is a well-characterized kinase pathway that controls differentiation programs, including adipogenesis, and serves as a reference for how kinase cascades can be interrogated experimentally.
• Loss-of-function, point-mutation, knock-in, and overexpression models are the main CRISPR strategies for dissecting the causal role of H2B-S36 kinases.
• Researchers can combine phospho-specific antibodies, mass spectrometry, and functional screens to map the writers, readers, and downstream consequences of H2B-S36 phosphorylation.
Description
GO:0140823 histone H2BS36 kinase activity is a Gene Ontology molecular_function term that defines the catalytic activity responsible for adding a phosphate group to serine 36 of histone H2B. The reaction consumes ATP and produces histone H2B-phosphoserine 36 plus ADP, making it a direct enzymatic link between cellular energy status and chromatin state. Because histone H2B is a core nucleosomal protein, modification of its S36 residue has the potential to alter nucleosome dynamics, transcription, and DNA-templated processes. Understanding this activity is therefore important for researchers who study epigenetic regulation, signal transduction, and kinase biology. The broader principle that kinase signaling pathways regulate histone modifications and epigenetic functions is supported by evidence that AMPK/Snf1 signaling controls histone acetylation and gene expression. Similarly, S6K1 signaling has been shown to govern differentiation programs such as adipogenesis, illustrating how kinase cascades can be experimentally dissected with inhibitors and genetic tools. These findings provide a conceptual and methodological foundation for investigating H2B-S36 kinases as signal-responsive chromatin modifiers.
histone H2BS36 kinase activity At A Glance
| GO ID | GO:0140823 |
|---|---|
| GO term | histone H2BS36 kinase activity |
| Ontology | molecular_function |
| Synonym | histone H2B-S36 kinase activity; histone kinase activity (H2B-S36 specific) |
| Major function | ATP-dependent phosphorylation of histone H2B at serine 36 |
| Reaction | histone H2B-serine (position 36) + ATP = histone H2B-phosphoserine (position 36) + ADP |
| Substrate | Histone H2B serine 36 |
| Cofactor | ATP (phosphate donor) |
| Product | Histone H2B-phosphoserine 36 and ADP |
What Is GO:0140823?
In plain terms, GO:0140823 describes an enzyme activity that takes a phosphate from ATP and attaches it to serine 36 of histone H2B. The official definition states that this activity catalyzes the reaction histone H2B-serine (position 36) + ATP = histone H2B-phosphoserine (position 36) + ADP. It is classified as a molecular_function, with synonyms including histone H2B-S36 kinase activity and histone kinase activity (H2B-S36 specific). The term therefore captures the catalytic capability itself, rather than the downstream biological process or the cellular location where the reaction occurs.
Why Is histone H2BS36 kinase activity Important in Cell Biology?
GO:0140823 is important because it defines a specific enzymatic activity that connects kinase signaling to a defined chromatin mark. Researchers studying gene regulation need to know which enzymes write histone H2B-S36 phosphorylation, how that mark is removed, and what downstream processes it controls. The term also provides a controlled vocabulary for annotating kinase-substrate relationships, which is essential for reproducible epigenetics and signal transduction research. Because kinase pathways such as AMPK/Snf1 and S6K1 are known to regulate histone modifications and differentiation programs, H2B-S36 kinase activity sits at a conceptual intersection of metabolism, chromatin, and cell fate. Precise annotation of this activity helps researchers design experiments that distinguish catalytic function from scaffolding or non-catalytic roles of candidate proteins.
• Provides a defined enzymatic activity for annotating kinase-substrate relationships in chromatin biology.
• Links ATP-dependent signaling to a specific histone mark, histone H2B phosphoserine 36.
• Supports mechanistic studies of how metabolic and growth-factor kinases influence gene expression.
• Offers a framework for comparing H2B-S36 kinases with other kinase pathways such as S6K1 that control differentiation.
• Enables development of phospho-specific reagents and assays for drug discovery.
• Helps interpret epigenomic datasets by assigning a catalytic function to candidate chromatin kinases.
• Facilitates cross-species comparison because histone H2B and kinase domains are evolutionarily conserved.
• Guides CRISPR model design for loss-of-function, point-mutation, and knock-in studies.
• Supports investigation of disease mechanisms where kinase signaling and chromatin are dysregulated.
• Improves reproducibility by using a standard GO identifier in publications and databases.
What Happens During histone H2BS36 kinase activity?
Substrate recognition and ATP binding
In simple terms: The enzyme first grabs the histone and an ATP molecule.
The catalytic cycle begins when a histone H2B-S36 kinase binds its substrate, histone H2B, and positions serine 36 within the active site. ATP binds in a compatible orientation so that the terminal phosphate can be transferred. This step depends on the kinase domain fold and on the local chromatin context, because histone H2B is typically embedded in nucleosomes. The general principle that kinase signaling pathways regulate histone modifications and epigenetic functions is supported by evidence that AMPK/Snf1 signaling controls histone acetylation and gene expression. Although the specific H2B-S36 kinase enzymes are not fully enumerated in the verified citations, the reaction chemistry follows the conserved mechanism of protein serine/threonine kinases.
Phosphoryl transfer to serine 36
In simple terms: The phosphate is moved from ATP onto the histone.
During catalysis, the gamma-phosphate of ATP is transferred to the hydroxyl group of histone H2B serine 36. This produces histone H2B-phosphoserine 36 and ADP, exactly as stated in the GO definition. The reaction is a covalent modification that changes the charge and steric properties of the histone tail or globular domain, potentially altering interactions with DNA and other chromatin proteins. Because the modification is site-specific, it can serve as a docking signal for reader proteins or as a regulator of nucleosome stability. The concept that kinase cascades can be experimentally dissected with inhibitors and genetic tools is illustrated by studies of S6K1 signaling in adipogenic differentiation.
Product release and chromatin consequences
In simple terms: After the phosphate is added, the enzyme lets go and the mark can affect chromatin.
Once phosphoryl transfer is complete, ADP and the modified histone are released. The newly deposited histone H2B-phosphoserine 36 mark can then influence transcription, replication, or repair depending on the cellular context. Because histone modifications often work in combination, H2B-S36 phosphorylation may be read together with acetylation or methylation marks. The broader link between kinase signaling and epigenetic functions is supported by evidence that AMPK/Snf1 signaling regulates histone acetylation and gene expression. Researchers can use this framework to hypothesize how H2B-S36 phosphorylation integrates into existing chromatin signaling networks.
Signal integration with growth and metabolic pathways
In simple terms: The kinase activity does not happen in isolation; it responds to cellular signals.
H2B-S36 kinase activity is likely embedded in signal transduction networks that sense nutrients, energy, and growth factors. AMPK/Snf1 signaling is a conserved regulator of histone acetylation and epigenetic functions, showing that metabolic kinases can directly influence chromatin. Similarly, S6K1 signaling controls adipogenic differentiation and can be modulated by natural compounds, demonstrating how kinase pathways are experimentally tractable. These examples support the idea that H2B-S36 kinases may integrate extracellular or metabolic cues into a specific histone mark. However, direct evidence linking these specific pathways to H2B-S36 phosphorylation is not provided in the verified citations, so this remains a hypothesis-generating framework.
Key Genes Involved in GO:0140823 histone H2BS36 kinase activity
The following genes and proteins are relevant to kinase signaling, chromatin regulation, and the experimental dissection of histone H2B-S36 kinase activity.
| Gene | Major Role | Research Relevance |
|---|---|---|
| PRKAA1 | Catalytic subunit of AMPK, a conserved energy sensor | AMPK/Snf1 signaling regulates histone acetylation and epigenetic functions |
| PRKAA2 | Catalytic subunit of AMPK | Provides redundancy in AMPK-dependent chromatin regulation |
| SNF1 | Yeast AMPK ortholog | Model for conserved kinase-histone crosstalk |
| RPS6KB1 | S6K1 kinase, growth and differentiation signaling | S6K1 inhibition impairs adipogenic differentiation |
| RPS6KB2 | S6K2 kinase, related to S6K1 | Potential parallel pathway in kinase signaling studies |
| H2B | Core histone substrate for S36 phosphorylation | Direct substrate of GO:0140823 |
| HIST1H2BA | Histone H2B family member | Candidate substrate for H2B-S36 kinase assays |
| HIST1H2BB | Histone H2B family member | Candidate substrate for H2B-S36 kinase assays |
| HIST1H2BC | Histone H2B family member | Candidate substrate for H2B-S36 kinase assays |
| HIST1H2BD | Histone H2B family member | Candidate substrate for H2B-S36 kinase assays |
| HIST1H2BE | Histone H2B family member | Candidate substrate for H2B-S36 kinase assays |
| HIST1H2BF | Histone H2B family member | Candidate substrate for H2B-S36 kinase assays |
| HIST1H2BG | Histone H2B family member | Candidate substrate for H2B-S36 kinase assays |
| HIST1H2BH | Histone H2B family member | Candidate substrate for H2B-S36 kinase assays |
| HIST1H2BI | Histone H2B family member | Candidate substrate for H2B-S36 kinase assays |
| HIST1H2BJ | Histone H2B family member | Candidate substrate for H2B-S36 kinase assays |
| HIST1H2BK | Histone H2B family member | Candidate substrate for H2B-S36 kinase assays |
| HIST1H2BL | Histone H2B family member | Candidate substrate for H2B-S36 kinase assays |
How Is histone H2BS36 kinase activity Regulated?
Regulation of histone H2BS36 kinase activity is expected to occur at multiple levels, including kinase expression, post-translational activation, subcellular localization, and substrate accessibility within chromatin. The verified citations provide evidence that AMPK/Snf1 signaling regulates histone acetylation and epigenetic functions, establishing a precedent for metabolic kinase control of histone marks. In addition, S6K1 signaling is a regulated pathway that can be inhibited pharmacologically, as shown by studies of eudesmin and fermented ginseng extract in adipogenic differentiation. These findings support the general principle that kinase cascades controlling chromatin are subject to upstream regulation by nutrients, growth factors, and small molecules. However, direct evidence for specific regulators of H2B-S36 kinases is not available in the verified citation list, so any proposed regulatory model should be tested experimentally.
histone H2BS36 kinase activity and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| PRKAA1 | Metabolic and epigenetic regulation | Knockout or point-mutation cell lines to test AMPK-dependent chromatin changes |
| RPS6KB1 | Adipogenic differentiation and growth signaling | S6K1 inhibitor-treated or knockout mesenchymal stem cells |
| HIST1H2BA | Chromatin regulation | Point mutation of S36 to alanine or aspartate to block or mimic phosphorylation |
| HIST1H2BB | Chromatin regulation | Knock-in of tagged H2B for chromatin immunoprecipitation studies |
| HIST1H2BC | Chromatin regulation | Overexpression and knockout models to assess dosage effects |
Metabolic and differentiation disorders
Kinase signaling pathways that influence chromatin are frequently dysregulated in metabolic disease. AMPK/Snf1 signaling regulates histone acetylation and epigenetic functions, linking energy status to gene expression. S6K1 signaling controls adipogenic differentiation, and its inhibition by natural compounds impairs this process. Because H2B-S36 kinase activity represents a chromatin-level output of kinase signaling, it is plausible that dysregulation of this activity contributes to metabolic and differentiation disorders. However, direct evidence connecting H2B-S36 phosphorylation to specific metabolic diseases is not provided in the verified citations, so this connection should be framed as a hypothesis for future research.
Cancer and aberrant kinase signaling
Many cancers involve deregulated kinase pathways and altered epigenetic landscapes. The finding that AMPK/Snf1 signaling regulates histone acetylation and epigenetic functions suggests that metabolic kinases can influence chromatin in ways relevant to tumor biology. Similarly, S6K1 is a growth-related kinase whose inhibition affects differentiation programs, a process often disrupted in cancer. While these citations do not directly study H2B-S36 phosphorylation in cancer, they establish a rationale for investigating whether H2B-S36 kinases contribute to oncogenic chromatin states. Researchers should treat this as a testable hypothesis rather than an established mechanism.
Developmental and stem cell biology
Differentiation of mesenchymal stem cells is regulated by kinase signaling, as shown by studies where S6K1 inhibition disturbs adipogenesis. Because histone modifications are central to cell fate decisions, H2B-S36 kinase activity may participate in developmental gene expression programs. The broader principle that kinase signaling regulates epigenetic functions is supported by evidence for AMPK/Snf1 control of histone acetylation. However, the verified citations do not directly demonstrate a role for H2B-S36 phosphorylation in development, so this section should be considered a conceptual extension.
From histone H2BS36 kinase activity-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Is a candidate kinase required for H2B-S36 phosphorylation? | CRISPR knockout of the candidate kinase gene followed by phospho-specific immunoblotting |
| Does S36 phosphorylation affect chromatin binding? | Point mutation of H2B S36 to alanine (phospho-dead) or aspartate (phospho-mimic) |
| Where is the kinase localized in cells? | Knock-in of an epitope tag at the endogenous locus |
| Does overexpression alter gene expression? | Doxycycline-inducible overexpression of the candidate kinase |
| Which pathways depend on H2B-S36 phosphorylation? | CRISPR library screening combined with phospho-signaling readouts |
| Can the mark be dynamically regulated? | Live-cell imaging with phospho-specific reporters or FRET sensors |
How to Study the histone H2BS36 kinase activity Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Phospho-specific immunoblotting | Levels of histone H2B phosphoserine 36 | Validation of kinase-dependent mark induction |
| Mass spectrometry | Site-specific histone phosphorylation | Confirmation of S36 modification and combinatorial marks |
| CRISPR knockout screening | Genes required for H2B-S36 phosphorylation | Discovery of writers and upstream regulators |
| RNA sequencing | Transcriptional changes | Downstream gene expression analysis |
| ChIP sequencing | Chromatin occupancy and histone marks | Mapping genomic distribution of H2B-S36 phosphorylation |
| Live-cell imaging | Dynamic changes in kinase activity | Real-time monitoring of signaling |
| In vitro kinase assay | Direct catalytic activity | Biochemical characterization of candidate kinases |
| Proteomics | Protein interactions and signaling networks | Identification of reader and effector proteins |
Phospho-specific immunoblotting and antibodies
The most direct way to study histone H2BS36 kinase activity is to use antibodies that specifically recognize histone H2B phosphoserine 36. These reagents allow researchers to monitor the mark in response to kinase activation or inhibition. Because the verified citations do not describe such antibodies in detail, this method should be optimized using standard validation procedures. The general principle that kinase pathways can be manipulated pharmacologically is supported by studies of S6K1 inhibition.
Mass spectrometry-based histone profiling
Mass spectrometry can detect and quantify histone H2B phosphorylation at specific residues, including serine 36. This approach is useful for confirming the site of modification and for mapping combinatorial histone marks. The broader concept that kinase signaling regulates histone modifications is supported by evidence for AMPK/Snf1 control of histone acetylation. Mass spectrometry is therefore a powerful orthogonal method for validating antibody-based results.
CRISPR-based genetic screens
CRISPR knockout and activation screens can identify genes that regulate H2B-S36 phosphorylation. By coupling a phospho-specific readout to pooled screening, researchers can discover writers, erasers, and upstream regulators. The utility of kinase pathway inhibition as a screening principle is illustrated by studies of S6K1 in adipogenesis. Screens should include appropriate controls and validation by targeted assays.
Transcriptomics and epigenomics
RNA sequencing and chromatin immunoprecipitation sequencing can reveal the transcriptional and epigenomic consequences of altering H2B-S36 kinase activity. These methods help connect the mark to gene expression programs. The finding that AMPK/Snf1 signaling regulates histone acetylation and gene expression provides a conceptual precedent for such analyses. Integrating transcriptomic and epigenomic data can generate testable hypotheses about downstream targets.
How CRISPR Can Be Used to Study GO:0140823 histone H2BS36 kinase activity
Knockout
CRISPR knockout of candidate H2B-S36 kinase genes is the primary approach to test whether a specific enzyme is required for the mark. Knockout cell lines can be compared with wild-type controls using phospho-specific antibodies or mass spectrometry. The principle that kinase pathways can be genetically or pharmacologically disrupted is supported by studies of AMPK/Snf1 and S6K1 signaling. Knockout models should be validated for off-target effects and for compensatory changes in related kinases.
Point Mutation
Point mutation of histone H2B serine 36 to alanine creates a phospho-dead substrate, while mutation to aspartate or glutamate can mimic phosphorylation. These CRISPR-engineered histone mutants allow researchers to test the causal role of the mark independently of the kinase. The concept that specific kinase-substrate relationships can be dissected with targeted mutations is consistent with the broader literature on kinase signaling. Care should be taken to account for the multiple H2B gene copies in the genome.
Knock-in
Knock-in of epitope tags or fluorescent reporters at the endogenous H2B or kinase locus enables localization and interaction studies. Tagged knock-in models can be used for chromatin immunoprecipitation, imaging, and proteomics. The utility of genetic tagging for studying kinase pathways is supported by the general principle that kinase signaling regulates chromatin and differentiation. Knock-in strategies require careful design to preserve endogenous regulation.
Overexpression
Overexpression of a candidate H2B-S36 kinase can test sufficiency for mark induction and downstream phenotypes. Inducible systems allow dose- and time-controlled experiments. The finding that S6K1 signaling can be modulated to affect differentiation provides a rationale for overexpression studies. Overexpression models should be interpreted with caution because supraphysiological levels can produce artifacts.
How EDITGENE Supports histone H2BS36 kinase activity Research
Researchers studying histone H2BS36 kinase activity-related genes often need to determine whether a candidate gene is causally involved in the modification, which downstream pathways depend on it, and how the mark responds to cellular signals. Answering these questions requires precise genetic models that can distinguish catalytic activity from scaffolding functions. EDITGENE provides a suite of CRISPR-based services designed to support each stage of this workflow, from initial knockout validation to sophisticated knock-in and screening approaches.
Contact EDITGENE today to design your custom CRISPR model for histone H2BS36 kinase activity research.
Frequently Asked Questions About histone H2BS36 kinase activity
What is GO:0140823 histone H2BS36 kinase activity?
GO:0140823 is a Gene Ontology molecular_function term describing the ATP-dependent phosphorylation of serine 36 of histone H2B, producing histone H2B-phosphoserine 36 and ADP.
What reaction does histone H2BS36 kinase activity catalyze?
It catalyzes the reaction histone H2B-serine (position 36) + ATP = histone H2B-phosphoserine (position 36) + ADP.
What genes are involved in histone H2BS36 kinase activity?
Candidate genes include histone H2B family members that provide the substrate, as well as kinases in signaling pathways such as AMPK/Snf1 and S6K1 that regulate chromatin and differentiation.
Is histone H2BS36 kinase activity a molecular function or a biological process?
It is classified as a molecular_function in the Gene Ontology, meaning it describes a catalytic activity rather than a larger biological process.
What are the synonyms for GO:0140823?
The synonyms are histone H2B-S36 kinase activity and histone kinase activity (H2B-S36 specific).
How can I study histone H2BS36 kinase activity in the lab?
Common approaches include phospho-specific immunoblotting, mass spectrometry, in vitro kinase assays, and CRISPR-based genetic screens.
What CRISPR models are useful for H2B-S36 kinase research?
Knockout, point mutation, knock-in, and overexpression models are all useful for testing the causal role and regulation of the mark.
Which signaling pathways regulate histone modifications?
AMPK/Snf1 signaling regulates histone acetylation and epigenetic functions, and S6K1 signaling controls differentiation programs, providing examples of kinase-to-chromatin regulation.
Why is histone H2B serine 36 phosphorylation important?
It provides a site-specific link between kinase signaling and chromatin state, which can influence gene expression and cell fate decisions.
Does EDITGENE provide services for H2B-S36 kinase research?
Yes, EDITGENE offers knockout, point mutation, knock-in, overexpression, CRISPR library screening, and bioinformatics services for chromatin and kinase research.
Conclusion
GO:0140823 histone H2BS36 kinase activity defines a specific enzymatic reaction that connects ATP-dependent signaling to a precise histone mark. Understanding this activity requires integrating knowledge of kinase pathways, chromatin biology, and experimental model systems. The verified literature on AMPK/Snf1 and S6K1 signaling provides a conceptual and methodological foundation for studying how kinases regulate histone modifications and differentiation programs. By combining CRISPR-based genetic models with phospho-specific and epigenomic readouts, researchers can systematically dissect the writers, regulators, and downstream consequences of H2B-S36 phosphorylation.
References
- 1. Salminen A et al.. 2016. AMPK/Snf1 signaling regulates histone acetylation: Impact on gene expression and epigenetic functions.. Cell Signal 28(8):887-95 PMID: 27010499
- 2. Nam KH et al.. 2018. Eudesmin impairs adipogenic differentiation via inhibition of S6K1 signaling pathway.. Biochem Biophys Res Commun 505(4):1148-1153 PMID: 30316515
- 3. Yi SA et al.. 2020. Fermented ginseng extract, BST204, disturbs adipogenesis of mesenchymal stem cells through inhibition of S6 kinase 1 signaling.. J Ginseng Res 44(1):58-66 PMID: 32148390
